8. SNIPE RESPONSIBLY
Confession time: we hate snipers. Nothing makes us happier than claiming the tags of a douche called xMeGaKiLLZx who sits in the same spot all match. You can guarantee he's the man who treats every mode like a death match, and spawn camps while his buddies get pasted defending the objective. Don't be him. Spot, support each other, and don't be afraid to change class when needed.
9. CAN'T DRIVE DON'T DRIVE
Look, we know being in a helicopter is badass - but if you're one of the people who take off and start ﬂying backwards, or who invariably bank into the hillside, then stay the hell away from the chopper. Sit in the gunner's seat and take pot shots at enemies, sure, there's no harm in that. But don't doom your squad to certain death by hopping in the pilot seat and screaming, "Hey guys, spawn on me!" Seriously.
10. IT'S GOOD TO TALK
Irrespective of the rest of the advice here, the most crucial thing that makes you a valuable part of any team is communication. If you plan on playing Battleﬁeld to any sort of beyond-noob standard, you need to talk to your mates. Tell them how you died, where the sniper is, how many people are defending/attacking a certain objective, or simply if they're about to get knifed in the back. It's so basic, but you'd be amazed how many mutes there are in any given game.